diff --git a/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt b/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt
index 3db211797c..642b5abd35 100644
--- a/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt
+++ b/jOOQ-manual/src/main/resources/org/jooq/web/grammar-3.12.txt
@@ -63,11 +63,15 @@ alterTableStatement = 'ALTER TABLE' [ 'IF EXISTS' ] tableName break
 | 'ADD' [ 'COLUMN' ] column
 | 'ADD' '(' ( 'CONSTRAINT' constraintName constraint | constraint | column )
       { ',' ( 'CONSTRAINT' constraintName constraint | constraint | column ) } ')'
-| ( 'ALTER' | 'MODIFY' ) [ 'COLUMN' ] identifier
-  (
-    [ [ 'SET DATA' ] 'TYPE' ] dataType [ [ 'NOT' ] 'NULL' ]
-  | ( 'SET' | 'DROP' ) 'NOT NULL'
-  | [ 'RENAME' ] ( 'TO' | 'AS' ) identifier
+| ( 'ALTER' | 'MODIFY' )
+  ( [ 'COLUMN' ] identifier
+    (
+      [ [ 'SET DATA' ] 'TYPE' ] dataType [ [ 'NOT' ] 'NULL' ]
+    | ( 'SET' | 'DROP' ) 'NOT NULL'
+    | [ 'RENAME' ] ( 'TO' | 'AS' ) identifier
+    )
+  | column
+  | '(' column ')'
   )
 | 'COMMENT' [ '=' ] stringLiteral
 | 'DROP' [ 'COLUMN' ] identifier [ 'CASCADE' | 'RESTRICT' ]
diff --git a/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java b/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
index 81489f4cf4..27eb9d195b 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
@@ -3162,16 +3162,18 @@ final class ParserImpl implements Parser {
     }
 
     private static final DDLQuery parseAlterTableAlterColumn(ParserContext ctx, AlterTableStep s1) {
+        boolean paren = parseIf(ctx, '(');
         TableField<?, ?> field = parseFieldName(ctx);
 
-        if (parseKeywordIf(ctx, "DROP NOT NULL"))
-            return s1.alter(field).dropNotNull();
-        else if (parseKeywordIf(ctx, "SET NOT NULL"))
-            return s1.alter(field).setNotNull();
-        else if (parseKeywordIf(ctx, "TO") || parseKeywordIf(ctx, "RENAME TO") || parseKeywordIf(ctx, "RENAME AS"))
-            return s1.renameColumn(field).to(parseFieldName(ctx));
-        else if (parseKeywordIf(ctx, "TYPE") || parseKeywordIf(ctx, "SET DATA TYPE"))
-            ;
+        if (!paren)
+            if (parseKeywordIf(ctx, "DROP NOT NULL"))
+                return s1.alter(field).dropNotNull();
+            else if (parseKeywordIf(ctx, "SET NOT NULL"))
+                return s1.alter(field).setNotNull();
+            else if (parseKeywordIf(ctx, "TO") || parseKeywordIf(ctx, "RENAME TO") || parseKeywordIf(ctx, "RENAME AS"))
+                return s1.renameColumn(field).to(parseFieldName(ctx));
+            else if (parseKeywordIf(ctx, "TYPE") || parseKeywordIf(ctx, "SET DATA TYPE"))
+                ;
 
         DataType<?> type = parseDataType(ctx);
 
@@ -3180,6 +3182,9 @@ final class ParserImpl implements Parser {
         else if (parseKeywordIf(ctx, "NOT NULL"))
             type = type.nullable(false);
 
+        if (paren)
+            parse(ctx, ')');
+
         return s1.alter(field).set(type);
     }